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Contact Supplier1.detailes: 1).weight: 125kg per sheet 2).purity: 99.97%-99.99% min 3).high quality, best price 4).coa, sgs certificate elements value elements value copper cu 99.97% min. silica si 0.3ppm max. Cobalt co 0.2ppm max. bismuth bi 0.1ppm max. Lead pb 0.2ppm max. tellurium te 0.05ppm max. Iron fe 2ppm max. silver ag 10ppm max. Aluminum al 0.5ppm max. selenium se 0.3ppm max. Manganese mn


